--  @testpoint:opengauss关键字reindex(非保留)，作为函数名

--关键字不带引号-成功
drop function if exists reindex;
create function reindex(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function reindex;
--关键字带双引号-成功
drop function if exists "reindex";
create function "reindex"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function "reindex";
--关键字带单引号-合理报错
drop function if exists 'reindex';
create function 'reindex'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `reindex`;
create function `reindex`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/